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nadezda [96]
3 years ago
5

What statement about biology is true

Biology
1 answer:
mezya [45]3 years ago
4 0
Biology is the study of life.
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which condition is a population that descended from a small number of common ancestors more likely to have
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decreased ability to survive changing conditions

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3 years ago
Which of the following would be an example of positive feedback? thanks!
kherson [118]

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3 years ago
Be able to compare/contrast humoral immunity with cellular immunity.
aksik [14]

Solution:

The difference between them are:


The humoral system of immunity is also called the antibody-mediated system because of its use of specific immune-system structures called antibodies. The first stage in the humoral pathway of immunity is the ingestion (phagocytosis) of foreign matter by special blood cells called macrophages. The macrophages digest the infectious agent and then display some of its components on their surfaces. Cells called helper-T cells recognize this presentation, activate their immune response, and multiply rapidly. While,


The cell-mediated immune response involves cytotoxic T-cells, or killer-T cells. Body cells that have been infected by foreign matter often present components of that material on their surfaces. Killer-T cells recognize these displays and respond by ingesting or otherwise destroying the infected cell. Killer-T cells are also important in the body's defenses against parasites, fungi, protozoans, and other larger cells that might have found their way into the body. The killer-T cells recognize these large invaders by their foreign proteins and then destroy them.  

This is the required answer.

6 0
3 years ago
Briefly differentiate "White Matter" & "Grey Matter".
evablogger [386]

Answer:

The CNS, or central nervous system is comprised of neurons, the cell units that form it. These cells, in turn, are formed by their cell bodies, the dendrites on them and the terminal ends of the axons, which are like the connectors, or roadways, for neurons. When viewed on a microscope, brain tissue, particularly, looks stained with two different colors: grey, or pinkisk, for the grey matter, and whiter for the white matter, which are the axons. This is basically why the two are called grey matter and white matter of the CNS.

So one difference between these two matters is the color they display when viewed. The second is the parts of the neuron that form the two; while the white matter is formed from the neuronal axons, the grey matter is formed by the dendrites, cell bodies and axonal terminals. A third differentiation is that most synaptic activity takes place in the grey matter, while most conduction of information from the cell bodies is performed by the axons.

8 0
3 years ago
mitochondria are important organelles within a cell. what would most likely happen if a cells mitochondria were not functioning
kakasveta [241]
There would be no energy supplied to the cell. Mitochondria is the powerhouse of the cell
7 0
3 years ago
Read 2 more answers
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